/Engine/Plugins/Online/OnlineFramework/Source/Lobby/Public/LobbyBeaconClient.h
Attempt to login a single local player with the lobby beacon
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(Server, Reliable, WithValidation) virtual void ServerLoginPlayer ( const [FString](API\Runtime\Core\Containers\FString) & InSessionId, const [FUniqueNetIdRepl](API\Runtime\Engine\GameFramework\FUniqueNetIdRepl) & InUniqueId, const [FString](API\Runtime\Core\Containers\FString) & UrlString )